RI NGSA Science Grade 5 Practice Questions - Rhode Island Next Generation Science Assessment (NGSA), Grade 5 Exam

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A student measures a pot containing 20 kilograms of dry soil and plants a 0.1-kilogram oak sapling. Five years later, the tree weighs 45 kilograms, but the dry soil mass decreased by less than 0.05 kilograms. How did the tree gain 44.9 kilograms of mass?

The tree converted sunlight energy directly into solid wood atoms. The tree absorbed carbon dioxide from the air and water from the soil to synthesize plant tissue. The soil regenerated its mass by converting root secretions back into dirt. The tree absorbed heavy minerals from rain without using air.

Correct Answer:

The tree absorbed carbon dioxide from the air and water from the soil to synthesize plant tissue.

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